Call discriminating arrangement for automatic toll ticketing telephone system



June 9, 1964 Filed DeC. 5, 1960 l. V. CALL DISCRIMINATING ARRANGEMENTFOR AUTOMATIC COLEMAN ETAL 3,136,862

TOLL TICKETING TELEPHONE SYSTEM 12 Sheets-Sheet l By Rober 7.' EvansAtty.

June 9, 1964 v. coLEMAN ETAL 3,135,362

CALL DISCRIMINATING ARRANGEMENT FOR AUTOMATIC TOLL TICKETING TELEPHONESYSTEM l2 Sheets-Sheet '2 Filed Dec. 5, 1960 INVENTORS /van 4V. ColemanRobert 7T Evans FIG. 2

Arly.

June 9. 1954 l v. COLEMAN ETAL 3,136,852

CALL DISCRIM'INATING ARRANGEMENT FOR AUTOMATIC TOLL. TICKETING TELEPHONESYSTEM Filed Deo. 5, 1960 12 Sheets-Sheet 5 INVENTORS F15 3 /van VCo/eman By Robert T. Evans Affy June 9, 1964 l. v. COLEMAN ETAL3,136,862

MINATING ARRANGEMENT FOR AUTOMATIC CALL DISCRI vTOLL TICKETING TELEPHONESYSTEM l2 Sheets-Sheet 4 Filed DeC. 5, 1960 /van V Coleman By Robert 7TEvans FIG. 4

June 9, 1964 v. COLEMAN ETAL 3,136,862

CALL DISCRIMINATING ARRANGEMENT FOR AUTOMATIC TOLL. TICKETING TELEPHONESYSTEM Filed Deo. 5, 1960 12 Sheets-Sheet 5 CODE STORAGE RELAY GRO UPSl2 THROUGH /7 1N VEN TORS FIG. 5 /van V Coleman BY Rober! 7T Evans June9, 1964 Filed Dec. 5, 1960 .n n/Harel FIG. 6

l. V. COLEMAN ETAL. CALL DISCRIMINATING ARRANGEMENT FOR AUTOMATIC TOLLTICKETING TELEPHONE SYSTEM 12 Sheets-Sheet 6 INVENTORS /van V. ColemanRobert 7. Evans June 9,. 1964 v. COLEMAN ETAL 3,136,862

CALL DISCRIMINATING ARRANGEMENT FOR AUTOMATIC TOLL TICKETING TELEPHONESYSTEM Filed DeC. 5, 1960 12 Sheets-Sheet '7 Alfy.

June 9, 1964 l. v. COLEMAN ETAL 3,136,862

CALL DISCRIMINATING ARRANGEMENT FOR AUTOMATIC Tou. TICKETING TELEPHONESYSTEM 12 Sheets-Sheet 8 Filed Dec. 5, 1960 INVENTORS Ivan V. ColemanRober! 7.' Evans vFIG. 8

Alfy.

June 9,

Filed Dec. 5, 1960 ..C CALI.. DISCRIMINATING V OLEMAN ETAL ARRANGEMENTFOR AUTOMATI TOLL TICKETING TELEPHONE SYSTEM l2 Sheets-Sheet 9 l l *l ll INVENTOR` /van V Coleman Rober! T Evans Airy.

June 9, 1964 Filed Deo. 5, 1960 coDExER /3 l. CALL. DISCRIMINATINGARRANGEMENT FOR AUTOMATIC TOLL. TICKETING TELEPHONE SYSTEM v COLEMANr-:TAL 3,136,862

12 Sheets-Sheet 10 /0 l/.ION

RLS

Rober# T Evans Atty.

June 9. 1964 l. v. COLEMAN ETAL 3,136,852

CALL DISCRIMINATING ARRANGEMENT FOR AUTOMATIC TOLL. TICKETING TELEPHONESYSTEM Flled Deo. 5, 1960 l2 Sheets-Sheet 1l /ITP l/DTT l/TI l/F /ls/H52 Pry L /lLc y E E E H53 Prx 2 E coN/v E Pry. s E

Pry 4 l/oEr l/Ts TRUNK 1 HTA L /lorf l FIG. l 1

INVENTORS /van V Coleman BY Rober! Evans June 9. 1964 l. v. COLEMAN ETAL3,136,862

CALL DISCRIMINATING ARRANGEMENT FOR AUTOMATIC TOLL TICKETING TELEPHONESYSTEM Filed Deo. 5, 1960 12 Sheets-Sheet 12 TRANSLA TOR CODE ASSIGNMENT JUMPER FIELD JUMPER F IE LD I2 TRI GODE LEADS IZBAR fr' IZHAI IZL C LGROUP/NG JUMPER /ZBAR FIG. 12

INVENTORS Ivan l/. Coleman Robert I Evans FIG. 8

FIG. FIG.

FIG.

FIG. I3

FIG. FIG. FIG. FIG.

FIG. FIG. FIG. FIG.

Affy.

United States Patent O CALL DISCPJMNATING ARRANGEMENT FR AUTMATIC TOLLTICKETING TELEPHNE SYSTEM Ivan V. Coleman, Naperville, and Robert T.Evans, Qak Park, lll., assignors to Automatic Electric Laboratories,Inc., Northlake, Ill., a corporation of Delaware Filed Dec. S, 1960,Ser. No. 73,632 3 Claims. (Cl. 179-18) The present invention relates ingeneral to automatic telephone systems and more particularlytoimprovements in automatic tool ticketing telephone systems arranged toautomatically select a proper route for the extension of an outgoingcall and supervise the process during the period of the extension of thecall.

In prior automatic tool ticketing telephone networks of the typedisclosed in the Ostline, Coleman and Taugner patent application, SerialNo. 628,474, filed December 3, 1956, now U.S. Patent No. 3,019,295, tollticketing telephone connections are established under the control ofcommon equipment accessed by a code dialed into thel local switch trainby the calling subscriber.' The common equipment usually includes a tollticket repeater, a calling line directory numberdetector, atranslator-sender circuit to insure that the digits are properly dialedinto the succeeding exchange and a tabulator with its associated datersand ticket perforators to compile the data relating to the call and makea record of it. This type of ticketing equipment has met with greatsuccess. In the improved toll ticketing system described herein tofurther increase the economies and versatilities offered by systems ofthis general type, the previously enjoyed advantages of toll ticketinghave been extended to exchanges in a network utilizing the presentstandard toll access number 112. This is performed by using anarrangement in the ticketer whereby the party identity is detectedduring the dialing of the called party number. In this connectionreference is made to the copending application of Edward l. Glenner,Serial No. 70,526, filed November 21, 1960. This improved type ticketer,installed in an oiiice, is used for the processing of subscriber dialedtoll calls from that oflice as well as from stations served by thebranch oflices. This ticketer eliminates the need for the dialing of aspecial party identity digit following the toll access code. Theelimination of the party identity digit deprives the ticketer ofsufficient time to access an available translator-sender before thesubscriber commences dialing the digits of the called nunrber. Thetranslator-sender cannot therefore immediately receive these digits asdialed by the subscriber. To overcome this diiiiculty, the ticketerstores the first digit, and while subsequent digits are being dialeddirectly to the translator-sender the first digit is removed fromstorage as a series of revertive pulses controlled mutually by theticketer and transender. This aspect of the present disclosure has beenclaimed in the copending application of Ivan V. Coleman, Serial No.73,749, iiled'December 5, 1960, now U.S. Patent No. 3,109,895. Y

The transender upon receiving the full complement of digits called forthe services of a translator. Upon an operative connection with anavailable translator the three area digits are forwarded to thetranslator for conversion into the proper routing for extension of thecall. However since this toll ticketing equipment is arranged to.

process outgoing toll calls from a plurality of originating exchanges,it is often desirable to restrict subscribers from certain of theseexchanges from placing toll calls to areas or exchanges, which they mayreach via free service trunks. This restriction or discriminationirnposes additional functions upon the translator to re- Y Patented June9, 1964 route or to inform the subscriber of the special con- Vnetworksa translator capable of distinguishing the originating otice and'routingthe call accordingly.

Another object is a translator and transender combination which controlsthe recording ticketer to mark the incoming trunk for the translator.

It is an ancillary object of the invention to provide new and improvedcircuits and apparatus for accomplishing the above operations.

It is a Vfeature of this invention to provide in a telephone system animproved translator operable to provide a special translation uponreceipt of a marking from a calling trunk.

Another feature of this invention is the circuitry of the translatorwhereby it will provide a conventional translation unless such markingis received.

- Further objects and features of the present invention pertain to theparticular arrangement of the various circuit elements of the automatictoll ticketing telephone system, whereby the above objects andadditional operating features are obtained.

The invention both as to its organization and method of operation,ltogether with further advantages thereof will best be understood byreference to the following specitication taken in connection with theaccompanying drawings, in which FIGURES 1-4, inclusive, illustrate inschematic form the details of the sender portion of the transender.

FIGURE-S 5 8, inclusive, illustrate in schematic form the details ofVthe coder portion of the transender.

FIGURES 9 and 10 illustrate in schematic form the ,details of thecodexer portion of the transender.

Vticketer llTK may be seized by the incoming trunk 11IT either directlyas shown or through the medium of switching equipment. The functions ofthe switching equipment, line finders, and selectors is well-known andtheir operation will not be described in detail. The functions of theticketer 11TK, translator 12TR, and the tabulator 11T2 with itsassociated equipment, will however be summarized for a clearerunderstanding of the invention. A detailed description of a ticketer foruse with this invention will be found in the copending application of E.l. Glenner, filed November 21, 1960,` Serial No. 70,526.

The principal functions of the Ticketer shown as box llTK are asfollows: v

( l) Function common to all calls.

(a) It calls for a transender when seized. (b) lt repeats to thetransender the Oiiice code digits on seven or eight digit calls orthearea code plus the oiiice code digits (if needed) on ten or eleven digitcalls.

(c) lt absorbs those digits of the called number which are not requiredfor sending.

. (d) lt provides for stop-dial and flashing signal supervision. 4 i

(e) After an adjustable grace period, it times the D length ofconversation from the time the called party answers until the callingparty disconnects.

(f) It stores the following ticketing information during conversation:the calling number (7 digits); the called number (7, 8, 10, or 11digits); and a change in toll rates indication, if it occurs during thecall.

(g) After the calling party has disconnected, it calls for a Tabulatorand transfers to it the ticketing information. During this transferoperation, the Ticketer is guarded against seizure from another call,but the calling line and the outgoing trunk are released. The Ticketerreleases after transfer is completed.

(lz) If the call is not answered, the Ticketer releases when the callingparty disconnects and no ticketing information is recorded for the call.

(i) It provides special markings to the Transender when unstandardconditions are encountered.

(j) It provides visual supervision of the progress of a call through theTicketer by means of the SUPY lamp.

(2) Functions of the Ticketer Pertaining to Local Access Calls.

(a) It tests for a low-resistance ground leak on the calling line.

(b) It determines the party identity and calls for a detection of thecalling partys number.

(c) It stores the first dialed digit while hunting for a transender andafter seizing a transender resends the first digit simultaneously withthe repeating of the second and third digits to the transender.

(d) It provides for extending the call to a D operator should anincomplete detection occur.

(3) Functions of the Ticketer Pertaining to Remote Access Calls (Type BService).

(a) It receives the calling partys number which has been detected in thebranch ofiice.

(b) It provides for extending the call to a D operator should anincomplete detection occur.

(c) It applies detector battery potential to the trunk C lead during thetranslation process.

(4) Functions of the Ticketer Pertaining to Remote Access Calls (Type DService).

(a) It provides for extending the call to a D operator when the callingparty has completed dialing the called number.

The translator 12TR is a group of relays which is used in conjunctionwith the transenders for the purpose of supplying the transenders withthe necessary routing directive as determined by the first three or sixdigits registered in the transender on its codexer. The translator iscommon to the transender, it is seized only momentarily when a routingdirective is required. The connection of the transender to thetranslator is controlled by the translator assigner.

The overall operation of the system whereby the primary object isattained involves the use of the ticketer, transender and tranlator. Theticketer upon access of a call from a branch exchange functions to applyan increased potential to the C lead of the incoming trunk after thetransender signals the ticketer that the translation is to be initiated.This potential on the trunk C lead is wired to the translator. In thetranslator this increased potential serves to route the code lead fromthe transender Via an alternate jumper field whereby it is routed to adifferent translator relay.

The tabulator 11T2 circuits function is to forward toll call ticketingdata to tape perforators. The toll call ticketing data consists ofinformation received from the ticketer, the dater-timer, the radexer (ifprovided), and from the tabulator itself.

The information received from the ticketers consists of the ticketeridentity number (three digits), conversation time (three digits), callednumber (seven, ten or eleven digits), calling number (five digits) and apossible change in rates during call conversation timing indication. Theinformation received from the dater-timer consists of the calendar date(day and month), the time of day and a day or night rate indication. Thedater-timer is directly connected to the tabulator via a dater-timertransfer circuit. The information connected directly within thetabulator is the tabulator identity (two digits) and the ABC office code(three digits) of the calling party.

The calling number received from the ticketer is composed of fourterminal digits and an ofiice code unit. The ofiice code unit is aspecial marking to one of ten relays, each of which represents aseparate office. Thus, the tabulator is capable of supplying a maximumof ten ABC office codes to the tape perforator.

The tabulator provides for access to as many as fifty ticketers. Undercontrol of the tabulator allotter, it will hunt for and find a ticketercalling for a tabulator.

All data received from the ticketer is stored on relays in the tabulatorprior to being forwarded to the tape perforator.

When the punched tape is processed for printing a ticket or punching arecord card, the tape roll is removed and fed into other equipment inthe reverse direction from that of the original punching.

In order that the ticket or punching card come out with a straightrecord of the call, all data is sent in reverse order from the ticketerto the tabulator and from the tabulator to the tape perforators. Thetabulator is described in greater detail in the Ostline applicationSerial No. 625,773 led December 3, 1956, now U.S. Patent No. 2,981,798.

FIGURE 12 of the drawing discloses the circuit of the translator insimplified form with the connections necessary for disclosing theoriginating office check feature.

FIGURE 13 illustrates the manner of combining FIG- URES 1-12 inclusiveof the drawings to form a unified system.

DETAILED OPERATION Seizure From Local Selector-Local Access Calls Whenthe calling subscriber at station 11PTY2 removes his receiver, the usualloop circuit, including the line conductors is completed for operatingthe line circuit 11LC. In response to the completion of the abovementioned loop circuit, the line circuit 11LC initiates operation of thedistributor and marks the terminals of the calling subscriber line inthe bank contacts of a group of line finders, including the line finder11F, having access to the calling subscriber line. For the purpose ofthis description it will be assumed that the distributor selects theline finder 11F and that the latter finder operates its wipers in avertical and then in a rotary direction in the well-known manner toselect the terminals in the associated bank terminating to the callingline. When the calling line is found by the line finder 11F, it extendsthe calling line to the individually associated first selector 11S1 andthe latter selector transmits the usual dial tone signal to the callingsubscriber to indicate that the dialing may be started. The above notedswitching apparatus, including the line circuit 11LC, the distributor,the line finder 11F and the first selector 1151 may be of conventionalconstruction and arrangement and may be, for example, of the typeillustrated in the Bakker Patent No. 2,289,896, granted July 14, 1942and in the Saunders Patent No. 1,849,694, granted March 15, 1932.

Since the calling subscriber at station 11PTY2 intends to extend theconnection to a called subscriber in a remote exchange it is necessaryto prefix the directory number of the called subscriber with the accesscode digits 112. Consequently, when the calling subscriber received thedialing tone signal the dial is actuated in accordance with the digit totransmit one loop impulse to the first selector 11S1. This selectorthen] raises its wipers in a Vertical direction to the first level andthen rotates its wipers over this selected level to search for asucceeding selector 11S2 and through 1152 and 1153 in the same manner toan idle ticketer, such as the tickopens its INT springs.

eter MTK. It will be assumed for the purpose of this description thatthe selectors now extend the connection from the calling subscriber lineby way of the cable to the ticketer. The cable includes the conductors,the conductor and the control conductor. If the ticketer is busy, thecontrol conductor will be grounded in order to indicate the busycondition to the selectors. Thus, as the selector rotates its wipersover the level it will pass over contacts terminating ticketers havinggrounded control conductors.

When the selector wipers come to rest upon contacts not having agrounded control conductor the ticketer is seized and will accept thedigits as dialed by the calling subscriber. These digits are comprisedof the ofce code and the terminal numbers, and if the call is to aforeign area the above digits will be preceded by a three digit areacode. The ticketer accepts these digits and stores them.l During thedialing by the calling subscriber of the Iirst digit the ticketerinitiates a hunt for a free transender unit. The second and subsequentdigits are repeated to the transender as dialed. The first stored digitis then sent to the transender revertively during the interval of thedialing of the second and third digits. When the ticketer is seized byan incoming trunk all of the operations are the same as described exceptthat the transender during its connection with the translator conditionsthe ticketer to apply an increased potential to the incoming trunk Cconductor.

Upon completion of the operations involving the transender the ticketerthen functions to complete and monitor the call.

OPERATION OF CODER (12) Seizure.-(0perated: Relays GTE and 6TC.) Absenceof ground on lead 1G marks this circuit idle to the Transender Hunterassociated with the preceding equipment (Ticketer). t

When seized, the circuit is closed to relay (SBB via lead 1B from theassociated Sender. Relay BB operates, closes ground to switch STR,closes lead 6TP (Time Pulse) to switch ST1, opens the circuits to relays6TE and dTC, prepares a circuit to relay 68A, closes ground to levels A,B, and C wipers of switch ST1, and prepares the holding circuit to thecodel storage relays. Relay @TC restores and closes ground to lead 1G.Relay 6TE restores, closes a multiple ground to lead 1G, and shortcircuits the thermistor 6T. Switch STR operates and The INT springs openthe circuit of switch STR. Switch STR restores, closes its INT springs,and advances its wiper one step which closes ground to lead ''RSH viaits level A wiper. On the first rotary step its R.S.O.N. springsoperate, close switch STR to lead SSI, and close a multiple ground tolead 1G. Pulses, via lead TP, are provided at 10 or 15 pulses per minutewith the rate automatically selected in accordance with the loadingofthe Transender group, closing ground to switch ST1 via the 6TP lead.The operation of timing switch 8T1 is explained in a subsequent section.

Type ANI Call Calling for a Translation-(Operated: Relay 6BB andswitches TR.) After the associated Codexer 13 has received the areaand/or ABC oice code and the associated Sender 11 has received acomplete detection indication from the Ticketer, ground is closed fromthe Sender 11 via lead ISAL, level D of switch 9SEQ in the associatedCodexer 13, lead SSAO, to relay 68A. Relay 68A operates transfers leadSHOLD from direct ground to resistance ground (relay 65K), grounds leadSSTART to indicate to the translator Assigner that a translation isrequired, and opens lead SAT.

Translation-(Operated: Relays GBB and 68A, and switches ST1, and STR.)As the Translator Assigner hunts for the calling Coder, resistanceground on lead SHOLD indicates to the Translator Assigner that thiscircuit requests a translation. When the Translator Assigner steps tothis circuit, low resistance battery is closed via lead SHOLD to relayGSK.

Relay 68K operates, closes lead SASSIGN to lead 1SL,

Start of Sending Immediate Sendz'ng.-(Operated: Relays 613B, 65A, and63K, and switches ST1 and STR.) For immediate sending the directive fromthe translator includes a ground mark on lead SMTA. Relay '7TA operatesthrough its first winding via ground on lead SMTA, locks through itssecond winding, and closes a circuit to relay SBR. Bar relay SBRoperates and extends leads 5MW11 through SMTD. Subsequent action in theCodexer 13 and Sender 11 causes the Translator 12TR to operate and closegrounds representing the sending control digit and a directive of one tosix digits to code storage relay groups marked CODELS 11 through 17. Thevarious code storage relays operate, lock, and close ground to the bankterminals of switch STR.

The ground mark on lead SMTA is also closed to leads SMTB and STAB whenbar relay 5BR operates. Ground via lead SMTB closes a circuit to` relayGSB which operates, locks, removes lead ZZT from relay 7DS, and opensleads 2T1, SPL, and SWP. Ground via lead STAB closes a circuit to relay'1TB which operates, locks, closes leads 24 VAC and MOT, and opens thecircuit to relay 65A. Relay 68A restores, transfers ground from leadSSTART to lead SHOLD, closes lead AT, grounds leads SSB and 5XT, andopens the circuit to relay 68K. Ground on lead SXT indicates to theTicketer that -digit or Q-digit called numbers are insuiiicient. Relay68K restores, opens the circuits to the iirst windings of relays 7TA and68B, removes ground from leads SAG and SYT, opens the circuit to relay5BR, opens lead SASSIGN from lead ISL, and removes leads SMTE and SMTCfrom relays 6TE and 6TC respectively. Relay 5BR restores, opens leadsSMW 11 through EMTD. Y

If the Coder received a ground mark on lead SMTC from the Translator12TR during translation, relay oTC will have operated (before relay 68Krestored), and ground will not be closed to lead SXT when relay 68Arestores. This indicates to the Ticketer that -digit or 9- digit callednumbers are insuiiicient.

Delayed Sending.-(Operated: Relays 6BB, 68A, and dSK and switches @T1and TR.) If sending must be delayed, the directive will include a groundmark on lead MTB instead of on lead SMTA. Relay 68B operates through itsfirst winding via ground on lead SMTB, locks through its second winding,removes lead ZZT from relay 7DS, opens the circuit of relay 653A, andopens lead 2T1, SPL, and SWP. Relay 68A restores, closes ground to leadSHOLD, removes ground from lead SSTART, closes lead SAT, and opens thecircuit of relay 68K. Relay 68K restores, prepares'a circuit to the rstwinding of relay '7TA, removes ground from leads SAG and 5Y T, removesleads SMTE and 5MT C from relays 6TE and 6TC, and opens the circuit tothe first winding of relay 68B.

At the. completion of dialing, ground is closed to the second winding ofrelay SDD via leads SDD, SCM, and SCA. Relay SDD operates X contactsSDD, locks on its second winding, closes a circuit to relay SDC toground via lead SDD, removes switch ST1 from the time pulsing circuit,closes switch ST1 to ground via its level A wiper, opens lead 711B, andcloses a circuit to relay 7TA. Switch ST1 operates and steps its wipersself-interruptedly. Relay SDC operates, recloses switch Tl to thepulsing circuit, and recloses lead 7F13. Relay lTA operates, locks andcloses a circuit to relay GSA. Relay 65A operates, closes lead SHOLD torelay 68K, and grounds lead SSTART. The Coder 12, is now ready forre-translation.

When the Translator Assigner again steps to this circuit, resistancebattery is closed to relay 68K, and translation continues as explainedin the preceding section.

Note-If conditions for re-translation are satised prior to assignmentfor initial translation, the re-translation cycle will be by-passed.Ground via lead SDD closes relay SDD which operates and closes a circuitto relays SDC and 7TA. The circuit continues to` operate as previouslydescribed.

Sending-(Operated: Relays GBB, 7TA, 7TB, GSB, possibly GTC, switches ST1and STR.) When ground is closed to lead SSB, relay ZSB of the Sender 11operates. Various relays in the Sender operate to start the sending ofthe sending control digit stored on relay storage group marked CODEL 11and appearing on bank position 1 or switch STR. They also close thecircuit to switch STR via lead SMM. Any one or two relays (W11, X11,Y11, or Z11) operated, will close ground through leads W11, X11, Y11, orZ11, levels C, D, E, or F of switch STR, leads SW, SX, SY, or SZ tolevels A and B of switch 481 of the Sender 11 to mark the sendingcontrol digit.

Switch 4S1 scans and, when both wipers are simultaneously connected toground, relay 4PC of the Sender operates, closes a circuit to relay ZPBwhich stops sending and opens the circuit of switch STR. Switch STRrestores and advances its wipers one step, connecting the rst digit ofthe routing directive through levels C, D, E, and F of switch STR to theSender through leads SW, SX, SY, and SZ. Ground from the Sender againcloses the circuit to switch STR. Switch 481 starts scanning again and,when both wipers are simultaneously connected to ground, relay SPCoperates, closes a circuit to relay 213B which stops sending and opensthe circuit to switch STR. Switch STR restores and advances its wipersone step. Subsequent digits stored are sent in the same manner asexplained above.

Release-(Operated: Relays SBB, 7TA, 7TB, SSB, various codel relays, andpossibly SDD, SDC, and GTC, and switches STR and ST1.) When theTransender Sender 11 releases, it removes ground from lead 1B to openthe circuit of relay SBB. Relay GBB restores, opens the circuits ofrelays SDD, 7TB, the operated codel relays, closes a circuit to relayGTE, closes a circuit to relay GTC (if not already operated), closeslead SHM to switch STR via its INT and R.S.O.N. springs, and removeslead GTP from switch ST1.

Relay 7TB restores, opens leads 24 VAC and MOT, removes ground from leadSSB, and opens the circuit to relay GSB. Relay SDD restores, and opensthe circuits of relays SDC and 7TA. The operated codel relays restore.Relays GSB and SDC restore. Relay 7TA restores and opens lead 2KT. RelayGTE operates and removes a multiple ground from. lead 1G. Relay GTCoperates (if not already operated) and removes a multiple ground fromlead 1G.

After the Sender 11 has released completely, ground is closed to leadSHM to close the homing circuit to switch ST1. Switch ST1 operates andhomes to normal. When at normal, its R.S.O.N. springs restore and closethe homing circuit to switch STR. Switch STR homes, and when at normalrestores its R.S.O.N. springs. The R.S.O.N. springs open its homingcircuit and remove ground from lead 1G. The circuit is now at normal.

Checking Operator Type Call Calling for a T ransIatr.-(Operated: RelaySBB and switches ST1 and STR.) The Ticketer closes ground via theTransender Hunter and lead ZZT to relay 7DS. Relay 7DS operates, locks,grounds lead 3SAK, and closes lead 3CA to relay 7TA.

After the associated Codexer 13 has received the area and/ or ABC officecode, ground on lead 1SAL is closed through level D of switch 9SEQ inthe Codexer 13, lead SSAO, to relay GSA. Relay GSA operates, transferslead SHOLD from ground to relay SSK, closes ground to lead S SSTART toindicate to the Translator Assigner that a translation is required andopens lead SAT.

T ranSIaIOm-(Operated: Relays GBB, GSA, 7DS, and switches ST1 and STR.)Translation is the same as explained earlier.

Start of Sending Immediate Sending.-(Operated: Relays GBB, GSA, GSK,7DS, and switches ST1 and STR.) Immediate sending is the same asexplained in an earlier section, except for the following. When relay7TA operates, ground is closed to lead 2KT (since, relay 7DS isoperated). Ground on lead ZKT indicates to the Ticketer that sending isto start.

Ground via lead SDD closes a circuit to relay SDD. Relay SDD operatesits X contacts SDDG locks, removes its second winding from lead SDD,closes the circuit ot relay SDC to ground via lead SDD, removes switchST1 from the time pulsing circuit closes switch ST1 to ground via itslevel A wiper, and opens lead 712B. Switch ST1 operates and steps itswipers self-interruptedly. Relay SDC operates, recloses switch ST1 tothe pulsing circuit, and recloses lead 7FB.

When the minimum required number of digits have been dialed (6 or 9 ifthe Coder 12 received a ground mark on lead SMTC, otherwise 7 or 10digits), the Ticketer prepares to call in a checking operator. This isindicated by resistance battery (relay SDC) on Coder 12 lead SDD.

When the checking operator enters the call, resistance battery is closedto lead SDD which shunts relay SDC. Relay SDC restores, opens lead 7FB,and opens switch ST1 to stop its timng action. After the calling partysnumber is keyed in, the checking operator leaves the call and theresistance battery is removed from lead SDD. Relay SDC reoperates,closes lead 7FB, and closes switch ST1.

Delayed Sending-(Operated: Relays GBB, 7DS, GSA, and GSK and switchesST1 and STR.) If sending must be delayed, the directive will include aground mark on lead SMTB instead of a ground mark on lead SMTA. RelayGSB operates through its first winding via ground on lead SMTB, locksthrough its second winding, removes lead ZZT from relay 7DS, opens thecircuit of relay GSA, and opens lead 2T1, SPL, and SWP. Relay GSArestores, closes ground to lead SHOLD, removes ground from lead SSTART,closes lead SAT, and opens the circuit of relay GSK. Relay GSK restores,prepares a circuit to the rst winding of relay 7TA, removes ground fromleads SAG and SYT, and removes leads SMTE and SMTC from relays GTE andGTC opens the first winding of relay GSB.

At the completion of dialing, ground is closed to the second winding ofrelay SDD via lead SDD. Relay SDD operates its X contact SDDG, locksremoves its second winding from lead SDD, closes the circuit of relaySDC to ground via lead SDD, removes switch ST1 from the time pulsingcircuit, closes switch ST1 to ground via its level A wiper, and closeslead 7F13. Switch ST1 operates and steps its wipers self-interruptedly.Relay SDC operates recloses switch ST1 to the pulsing circuit, andrecloses lead 7FB.

When the required number of digits have been dialed, the Ticketer callsin the checking operator. Response of the checking operator closesvarious relays in the Ticketer and Sender 11. Sender 11 relay SCToperates and closes a circuit between leads SCA and SCM which closes acircuit to relay 7TA. Relay 7TA operates, locks, closes a circuit torelay GSA, and grounds lead ZKT. Relay GSA reoperates, closes lead SHOLDto relay GSK, and grounds lead SSTART. The Coder 12 is now ready forretranslation. When the Translator Assigner again steps to this circuit,resistance battery is closed to relay GSK, and translation continues asexplained in an earlier section. The checking operator, who entered thecall,

Special Directives If the Coder 12 receives a ground mark on lead SMTD,ground is closed to relay STD. Relay STD operates, locks, and opens theoperating circuit to relay SDD. Relays SDD and SDC will not operate andresistance battery (relay SDC) will be completely withheld from leadSDD. The checking operator will thus be by-passed when routingnon-dialable, blocked, and unassigned codes or when routing to recordedmessage, tone, or int` tercept termination on the basis of the lindingthat no trunks are available on the initial translation.

If the Coder receives a ground mark on lead SMTE ground is closed torelay GTE. Relay GTE operates, locks, removes multiple ground from lead1G, and removes a short circuit from THERMISTOR 6T. At the completionofrdialing, ground lis closed to relay SDD through the THERMISTOR 6T vialead SDD. After a time delay, relay SDD operates as previouslydescribed. The ground mark on lead SMTE is used in mixed numberingsystems when extra-pull calls are comparatively numerous. Y

Sending-(Operated: Relays 6BB, 7TA, 7TB, 65B, 7DS, SDD, SDC, possiblySTD, GTE, and 6TC, and switches ST1 and STR.) Sending is the same asexplained in an earlier section, with the following excepttion.

If all digits of the called number are to be deleted (indicated byground on lead SMTD during translation), switch STR stepsself-interrupted from bank terminal 9 to 10 because of the operation ofrelay STD on translation. The reading leads SW, SX, SY, and SZ are,therefore, not extended to the Ticketer in this case; instead a blankedpulse sending cycle occurs on bank terminal 10 to cause the Ticketer tocut-throughand release the Transender. Lead 7R50 is also grounded onthis step of switch STR.

At this point the Sender 11 goes through the motion of sending code WXZand sends a sequencing pulse to the Ticketer which in turn switchesthrough and elects release.

ReIeaSa-(Operated: Relays 6BB, 7TA, 7TB, GSB, SDD, SDC, 7DS, variouscodel relays, and possibly 6TE, GTC, STD, and switches STR and ST1.)When the Transender Sender 11 releases, it removes ground from lead 1BtoV open the circuit to relay 6BB. Relay 6BB restores, opens thecircuits to relays 7TA, 7TB, SDD, 7DS, STD, (if operated), the operatedcodel relays, closes 6TE and 6TC (if not already operated), closes lead5HM to switch STR via its INT and R.S.O.N. springs, and removes lead 6TPfrom switch ST1. Relay 'ITB restores, opens leads Z4 VAC and MOT,removes ground from lead 38B, and opens the circuit to relay 68B. RelaySDD restores and opens the circuit of relay SDC. The operated codelrelays restore. Relays B, SDC, 7DS, and 7TA restore. Relay STD restores.Relays 6TC and GTE operate (if not already operated) and remove multipleground from leadlG.

After the Sender 11 has released completely, ground is closed to leadSHM to close the vhoming circuit to switch ST1. Switch ST1 operates andhomes to'normal.

When at normal, its `R.S.O.N. springs restore and close the homingcircuit to switch STR homes, and when at normal restores its R.S.O.N.springs. R.S.O.N. springs open its homing circuit'and remove ground fromLead 1G. The circuit is now at normal.

The v Call ProgressTl'ming p Switch ST1 supervises the subscribersdialing and various functions of the Ticketer and Transendcr byproviding time check points on its bank contacts as follows.

Checkpoint: Switch ST1 bank position (a) Detection completed or checkingoperator call indication received Level B,

- contact #5. (b) Dialing of code'completed (six digits if dualtranslated) Level B,

contact #6.

(c) Stu c k Translator Assigner Check, iirst translation Level B,

Contact #8. (d) First translation complete Level B,

Level B.

Level C, contact #1. (g) All translation complete, au-

tomatic n u m b e r identification calls only Level C,

contact #2. (h) Sending complete on automatic number identificationcalls Level C,

' contact #7.

(i) Sending complete on checking l operator calls Level C,

contact #10.

Switch ST1 follows the ground pulses via lead STP and steps its wipersevery 4 to 6 seconds. On a normal call, the timing switch lags the callprogress, therefore it must be reset (see (e) above). When relay SDDoperates, ground is closedV to switch ST1 via its level A wipers. SwitchST1 steps self-interruptedly to bank contact number 1S and restores. Theoperation of relay SDC recloses switch ST1 to the time pulsing circuit.Its level C wipers are now positioned to continue the checking, i.e.,checkpoint (f). When the call is completed switch ST1 homes to normalvia lead SHM.

Optional Wiring This'circuitis arranged to provide optional translationswhich are set up by strap wiring for special routing digits. The desireddigits are to be strapped in accordance with the following code.

The built in translations provided are TX, TY, and TT.

TX Tanslation.--(Operated: Relay 612B and switches ST1 and STR.) Whenthe subscriber fails to dial digit 0, if required by the Ticketer,ground is closed to lead 5XT which closes the circuit to 7TX, strapB4Bto D6. For busy tone without routing: strap B1 to 3.

For special routing (omitting Bl-BS strap) strap A1 1 i; and/or B1individually to required terminals of group CS-C if second routing digitis needed.

To Provide Special Routing Directive Relay TX operates, closes circuitsto the lirst winding of relay '7TB, STD, the first winding of relay 7TA,and closes the operating circuits to code storage relay groups markedCodel 12 and possibly, Codel 13 (depending on the strapping). Theappropriate storage relays operate, lock, and close ground to theassociated bank terminals of switch STR. Relay STD operates, locks,closes circuit to the storage relay Z11, and connects terminal 9 oflevel A switch STR to lead 35K. Code storage relay Z11 operates, relay7TA operates and locks through its second winding. Relay '7TB operates,locks through its second winding, closes a circuit to the second windingof relay 65B, and closes lead SSB to operate relay 2SB in the Sendercircuit 11 which starts the sending operations. Relay 6SB of the Coderoperates, locks, and opens the circuit of relay 7TX. Relay 7TX restoresand removes multiple ground from relays STD, 7TA, the iirst winding ofrelay 7TB, and operated Codel relays W12-Z12, and W13-Z13.

When the sending cycle begins, ground closed to lead SMM closes acircuit to switch STR. Switch STR operates. Relay Z11 of Codel 11 is atthe present connected through level F of switch STR and lead SZ toswitch 4S1 of the Sender circuit 11. The operations of the control digitare the same as explained in the preceding section.

When the sending cycle is completed, ground is removed from lead SMM toopen switch STR. Switch STR restores and advances its wipers to bankterminal 2 associated with storage group CODEL 12, which stores themarking for the lirst digit or the special routing directive. Ground onlead SMM again operates switch STR. After the sending cycle iscompleted, ground is removed from lead SMM to open switch STR. SwitchSTR restores and advances its wipers to bank terminal 3 associated withstorage group CODl-EL 13. The second digit (when provided) is sent inthe same manner as explained above.

At the end of the lirst or second digit, the circuit is closed to switchSTR from ground through its level A wiper, lead SSK, through the Sendercircuit 11, lead 4SI, and its R.S.O.N and INT springs. Switch STR stepsits wipers self interrupted to bank terminal which closes the circuit torelay ERS of the Sender circuit. In addition, ground is closed to leadsSW, SX, and SZ through bank terminal 10. Switch 451 of the Sendercircuit starts operating and, when wipers A and B of switch 4S1 areconnected simultaneously to ground, relay 4PC operates and sends aground pulse via lead 1PT to a switch of the Ticketer to cause theTicketer to switch through and free the Transender.

T o Provide Busy T one to the Calling Party If in this condition it isdesired to close busy tone to the calling party instead of a specialrouting, the following action will take place. Relays 7TX, 7TA, 7TB, and68B operate as explained in the preceding Section with the followingexception. Ground is closed to leads SRLS and '/'FB via terminals '7B1and 7B3, instead of the codel relays, when relay 7TX operates. Thisground closes the circuit to relay ITS of the Sender 11. Relays ITSoperates and opens the circuit of Sender relay 1BB from lead 1HT. Thisaction of the Transender, in initiating its own release, causes theTicketer to extend busy tone to the calling party.

Release-(Operated: Relays 6BB, '7TA, 7TB, STD, SB, and various operatedcodels, and switches ST1 and STR.) When sender relay IBB restores, itremoves ground from lead 1B which opens the circuit of relay 6BB in thiscircuit. Relay 6BB restores, opens the circuits of relays 7TA, 7TB, STD,SSD, removes lead 6TP from ST1, opens the operated codel relays, closeslead SHM t0 switch ST1 via its INT and R.S.O.N. springs, and closes acircuit for relay 6TE and 6TC. The codel relays restore. Relay 7TArestores and removes ground from lead SSB. Relay 7TB restores and openslead 24VAC and MOT. Relays 6SB and STB restore. Relays 6TC and 6TEoperate and remove multiple ground from lead 1G.

After the Sender 11 has released completely, ground is closed to leadSHM which closes the homing circuit to switch ST1. Switch ST1 operatesand homes to normal. When at normal, its R.S.O.N. springs restore andclose the homing circuit to switch STR. Switch STR homes, and when atnormal restores its R.S.O.N. springs. The R.S.O.N. springs open itshoming circuit and remove ground from lead 1G. The circuit is now atnormal.

T Y Translation.-(Operated: Relay 6BB and switches STR and ST1.) Ifthere is a low-resistance ground lead on either the tip or the ring sideof the calling line, ground is closed to lead SYT which closes thecircuit to relay 7TY.

For busy tone without routing: strap B2 to B3. For special routing(omitting above strap), strap A2 and/or B2 individually to requireterminals of group A3-A6 for first routing digit.

Strap C2 and/ or D2 individually to required terminals of group C3-C6 ifsecond routing digit is needed.

To Provide Special Routing Directive Relay 7TY operates, closes acircuit to the rst winding of relay 7TB, STD, lirst winding of relay7TA, and closes the circuits to the code storage relay groups markedCodel 12 and possibly Codel 13 (depending on the strapping). Subsequentoperations are as explained in the earlier section.

To Provide Busy Tone to the Calling Party If, in this condition, it isdesired to return busy tone to the calling party instead of a specialrouting, the following actions will take place. Relays 7TY, 7TA, 7TB,STD, and 63B operate as explained in the preceding section with thefollowing exception. Ground is closed to leads SRLS and '7FB throughterminals 7B2 and 7B3, instead of the operated codel relays, when 7TYoperates. Subsequent operations are as explained in the earlier section.

When the Sender relay IBB restores, the circuit releases as describedearlier.

TT Trmzsatio11.-(Operated: Relays 6BB and 65A and switches STR and ST1.)

T ranslutor Assigner Failure If a call requiring translation has notbeen extended to the Translator within a specied period, presumably dueto failure of the Translator Assigner, ground from timer switch ST1 isclosed via its level B bank terminal 7 to relay 7TT.

Translator Assigner Failure provides automatic transfer of translatorassigner and either sending of special routing digit or busy tone fromassociated ticketer.

For busy tone without routing: Strap E2 to D4, B5 to B3, F2 to F3 and F5to F6.

For special routing (omitting above straps) strap E2 to D4, F2 to F3, F5to F6 and E1 to F1 also strap B5 and/ or B6 individually to requireterminals of group A3-A6 for routing digit. A second digit may be marked(terminals C3-C6) provided each digit is 7 or higher.

To Provide Special Routing Directive Relay 7TT operates, closes acircuit to the irst winding of relay 7TB, STD, first winding of relay7TA and the circuits to codel storage relay group marked Codel 12 andpossibly Codel 13 and prepares a failure alarm circuit via lead SAT.Subsequent operations are as explained in the earlier section with thefollowing exceptions. Relay T o Provide Busy Tone to the Calling Partylf in this condition, it is desired to close busy tone to the callingparty instead of a special routing, the following actions will takeplace. Relays 7TT, 7TA, 7TB, STD, and GSB operate as explained in thepreceding section with the following exception. Ground is closed toleads SRLS and 'IFB through terminals 7BS and 7B3, instead of theoperated Codel relays, when relay 'TTT operates. Subsequent operationsare as explained in the earlier section.

GPERATION OF CODEXER (13) When the Transender is seized, a pulsingcircuit is closed to relay 9PA via lead SPL and level A wiper of switch9SEQ through the Coder 12 and Transender Hunter to the Ticketer whichrepeats these pulses as the calling party dials them. Revertive pulsingof the iirst digit is to rotary switch 10AA Via lead IFT. All otherdigits pulsed arev closed to the Codexer 13`via lead SPL.

Office or Foreign Area Code Signal Translation The calling party hasalready dialed the first digit, and it will be received by the Codexer13 at any time up to the completion of thek third digit.

Ground closed to lead 1B from the Sender circuit closes a circuit torelay 9RE. Relay 9REl operates,'locks, i

opens a circuit between leads 1RV and IDK, and leads IFT and SDD, andcloses lead lFT to switch NAA.

Relay 9PA follows the pulses of the second digit received from theTicketer and, when operated on the first pulse, closes a circuit torelay 9CA and theVERT magnet 9V. Relay 9CA operates and closes a circuitto switch 9SEQ. Switch 9SEQ operates and opens its INT springs. The VERTmagnet 9V follows the pulses from relay 9PA and steps the wipers to thedesired line. On the first vertical step the VON springs close. Relay9CA remains operated during pulsing due toits slow-to-releasecharacteristic. After the last pulse of the digit, the circuit to relay9PA is opened. Relay 9PA restores and opens the VERT magnet 9V and thecircuit to relay 9CA. The VERT magnet 9V restores. Relay 9CA restoresand Y opens the circuit to switch 9SEQ. Switch QSEQ restores,

closes its INT springs, steps its wipers to bank contact number 1, andoperates its R.S.O.N. springs. Ground via its level C wiper is closed toswitch 9SEQ. Switch 9SEQ operates and opens its INT springs. The INTsprings open the circuit to switch QSEQ. Switch SSEQ restores, advancesits wipers to contact number 2, and closes its INT springs. The circuitis now ready for the third digit. n

Receiving the First Digit-(Operated: Relay 9RE and the R.S.O.N. Springsof Switch 9SEQ.) Assume the pulses of the first digit Vare closed toswitch 10AA during the pulsing `of the second digit since the iirstdigit pulses must be sent no later than the end of the third digit.Switch NBAA follows these pulses and steps its wipers to the bankcontactcorresponding to the first digit. On the first rotary step ofswitch NAA its R.S.O.N. springs operate. The INT springs close groundpulses (corresponding to` the rst digit) to lead 1RV.

When the first digit has been received, switch 10AA restores and its INTsprings remain at normal.

Dialing the Third Digit of the Code.-(Operated: Relay 9RE and theR.S.O.N. Springs of Switches 9SEQ from the Ticketer and, when operatedon the first pulse, closes a circuit to relay 9CA and the ROT magnet 9R.Relay 9CA operates and closes a circuit to switch 9SEQ. The ROT magnet9R operates and follows the pulses of the digit and steps the wipers tothe associated bank contact. Relay 9CA remains operated during pulsingdue to ld its slow-to-release characteristic. At the completion of thethird digit the circuit to relay 9PA is opened. Relay 9PA restores andopens the circuit to relay 9CA.

Y Relay 9CA after its slowtorelease interval, restores and and NAA.)Relay 9PA follows the dial pulses received Y opens switch 9SEQ. Switch9SEQ restores and advances its wipers to bank contact number 3, whichcloses a circuit to thev second winding of relay 9RE in opposition tothe'rst winding of relay 9RE via its level C wiper, closes lead SSAO tolead 1SAL via its level D wiper to close a circuit to relay GSA in theCoder circuit, and prepares the pulsing circuit to switch 9AB. Relay 9RErestores, closes the circuits between leads lRV and 1DK and leads IFTand SDD, and disconnects lead IFT from switch 10AA. Ground from theTranslator Assigner circuit closes a circuit to relay GSK in Coder 12which in turn grounds lead SAG to close a circuit to relay 10AG of thisvcircuit. Relay 10AG operates, closes ground to lead NHA to operate arelay in the Translator, closes lead 1ASR tothe wiper cord terminals,and closes ground to the H lead corresponding to the first digit 9H1-9H9via the level A and C wipers of switches 9AB and 10AA respectively, tomark the hundreds group.

When the Coder has received the translation from the Translator, groundis removed from lead SAG to open the circuit of relay 10AG. Relay 10AGrestores, removes ground from lead NHA, opens the circuit between leadlASR and the wiper cord terminals, and removes ground from the selectedH lead.

Foreign Area Code With Dual Translation Dialing the "Second Digit of theArea Coda-(Operated: VON Springs.) The calling party has already dialedthe irst digit, and it will be received by the Codexer at any time up tothe completion of the third digit. Relay 9RE operates as explained in anearlier section.

The second digit of the Area code is either a l or a 0. For the purposeof this explanation, assume that digit l is dialed.

`Relay 9PA follows the pulse(s) (pulse in this case since it is assumeda l is dialed) of the second digit received from the Ticketerv and whenoperated on the first pulse, closes a circuit to'relay 9CA and the VERTmagnet 9V. Relay 9CA operates and closes a circuit to switch 9SEQ. TheVERT magnet 9V follows the pulse(s) from relay 9PA and steps the vwipersto the desired level. On the first vertical step, the VON springs closeand the LEFT N.P. SPGS 9LNP operate. Relay 9CA remains operated duringpulsing due to its slow-torelease characteristic. After the last pulseof the digit, the circuit to relay 9PA is opened. Relay 9PA restores andopens the circuit to the VERT magnet 9V and relay 9CA. The VERT magnet9V restores. Relay 9CA restores, opens switch 9SEQ, and closes thecircuit to relay 9X1. Switch 9SEQ restores, steps its wipers to bankcontact number 1, and operates its R.S.O.N. springs. Switch 9SEQ stepsself-interrupted to bank Contact number 2 as described in the earliersection. Relay 9X1 operates, locks` and prepares a circuit to switch10CS via level C wiper to switch 9SEQ.

Receiving the First Digit of the Area Code.-(Op erated: Relays 9RE and9X1, the LEFT N.P. SPGS, and the R.S.O.N. Springs of Switch 9SEQ.) Thepulses of the first digit are closed to switch 10AA as described in anearlier section.

Dialing the Third Digit of the Area Coda-(Operated: Relays 9RE and 9X1,the LEFT N.P. SPGS, and the R.S.O.N. Springs of Switches 9SEQ and 10AA.)Relay 9PA follows the dial pulses received from the Ticketer and, whenoperated on the first pulse, closes a circuit to relay 9CA, the rotarymagnet 9R, and switch MECS. Relay 9CA operates and closes a circuit toswitch 9SEQ. The rotary magnet 9R and switch 10CS follow the pulses fromrelay 9PA and step their Wipers accordingly. At the completion of thedigit, the pulsing circuit to relay 9PA is opened. Relay 9PA restores,

opens the pulsing circuits to the rotary magnet 9R and switch CS, andopens the circuit to relay 9CA. The rotary magnet 9V restores. SwitchICS restores and advances its wipers to the contact corresponding to thethird digit. Relay 9CA restores and opens the circuit of switch 9SEQ.Switch 9SEQ restores, advances its wipers to bank Contact number 3 whichcloses a circuit to the second winding of relay 9RE in opposition to thefirst winding of relay 9RE via its level C wiper, and prepares a pulsingcircuit to switch 9AB. Relay 9RE restores as described in an earliersection.

Dialing Digit "A of the Oce Coda-(Operated: Relay 9X1, the R.S.O.N.Springs of Switches 9SEQ, IOAA, and IGCS, and the LEFT N.P. SPGS.) Relay9PA follows the pulses from the Ticketer and, when operated on the firstpulse, closes a circuit to relay 9CA and to switch 9AB. Relay 9CAoperates, closes a circuit to switch 9SEQ, and closes a circuit to therelease magnet RLS. The release magnet RLS operates and releases theswitch shaft. When the shaft returns to normal the vertical olf-normalsprings IOVON operate and the LEFT N.P. SPGS 9LNP restore. Switch 9SEQoperates. Switch 9AB follows the pulses from relay 9PA and steps itswiper accordingly. On its iirst rotary step the R.S.O.N. springs ofswitch 9AB operate. Relay 9CA remains operated during pulsing due to itsslow-to-release characteristic.

After the last pulse of digit A, the circuit to relay 9PA is opened.Relay 9PA restores, opens the circuit of switch 9AB and relay 9CA.Switch 9AB restores and steps its wiper to the contact corresponding tothe A digit. Relay 9CA restores, and opens the circuit to switch 9SEQand the release magnet RLS restores. Switch 9SEQ restores and advancesits wipers to bank contact number 4 to prepare a circuit to the VERTrnagnet 9V.

Dialing Digit "B" of the Olce Coda-(Operated: Relay 9X1, the R.S.O.N.Springs of Switches 9SEQ, 9AB, ItlAA, and IGCS, and the VON Springs.)The B digit is pulsed to the vertical magnet as described for the seconddigit in section titled Dialing the Second Digit of the Area Code withthe following exceptions. Relay 9RE does not operate, the switch 9SEQdoes not step self-interrupted. The R.S.O.N. spring of switches 9SEQ,9AB, 10AA, and IOCS are operated. At the completion of the digit, switch9SEQ restores and advances its wipers to bank contact number 5, Whereits level B wiper prepares a circuit to the rotary magnet 9R.

Dialing Digit "C of the Office Coda-(Operated: Relay 9X1 and theR.S.O.N. Springs of Switches 9SEQ, 9AB, 10AA and IGCS.) The digit C ispulsed to the rotary magnet 9R as described in the earlier sectionexcept relay 9RE does not restore (since it was not operated) at thecompletion of the digit. At the completion of the digit, switch 9SEQ andrelays 9PA and 9CA restore.

vWhen switch 9SEQ restores and advances its wipers to bank contactnumber 6, a multiple ground is closed to relay 9X1 via its level Cwiper, and closes lead SSAO to lead ISAL directly via its level Dwipers.

Ground via lead SAG closes a circuit to relay IOAG as described earlier.Relay IOAG operates, closes ground via bank contacts and wipers ofswitches ICS, IGAA, and 9SEQ to one of the F leads (IDFA-IOFF) to closethe bar relay for the associated area, closes lead IASR to the Wipercord terminals, and closes ground to one of the H leads (IOHI-IOH9) tomark the hundred group.

After the Coder 12 has received the translated information from theTranslator, ground is removed from lead SAG to open the circuit of relayIOAG. Relay IUAG restores, removes ground from the marked H lead and Flead, and removes lead IASR from the wiper cord terminals.

Release From a Foreign Area Call Wit/z Dual Translaton.--(Operated:Relay 9X1 and the R.S.O.N. Springs of Switches 9SEQ, 9AB, IAA, andIOCS.) At the completion of the translated information, ground via leadSHM is closed to switch 9SEQ. Switch 9SEQ operates and opens its INTsprings. The INT springs open the circuit to the motor magnet of switch9SEQ. Switch 9SEQ restores, closes its INT springs, and advances itswipers to contact number 7. When switch 9SEQ steps from contact number 6to number 7 relay 9X1 is opened and the circuit between leads SSAO andISAL is opened. Relay 9X1 restores. Switch 9SEQ continues to home tonormal self-interruptedly and, when at normal, its R.S.O.N. springsrestore, open the homing circuit to switch 9SEQ, and close a homingcircuit to switch 9AB. Switch 9AB operates and homes to normalself-interruptedly. When at normal, its R.S.O.N. springs restore, openthe homing circuit to switch 9AB, and close the homing circuit to switchIGAA. Switch IOAA homes to normal self-interruptedly and, when atnormal, restores its R.S.O.N. springs to open switch IAA and closeground to the release magnet RLS. The RLS magnet operates and releasesthe switch shaft. When the shaft returns to normal the vertical offnormal springs IOVON operate, to open the RLS magnet circuit. The RLSmagnet restores. The circuit is now at normal.

OPERATION OF SENDER (11) Seizure When a Ticketer is seized on anoriginating call, its associated Transender Hunter operates to connectit to an idle Transender. When the Transender Hunter finds an idleTransender, ground is closed to lead IHT which closes a circuit to relayIBB. Relay IBB operates, grounds lead IB at contacts IBB6 to operaterelay 6BB in the Coder 12 and relay 9RE in the CodeXer I3, closesresistance IRS and IR3 ground respectively to leads ITB and IML, shortcircuits the first winding of relay ITS, grounds lead IUM, and closesground through the second winding of relay 2RS to leads 8E and ISC.

When the first digit has been received by the Ticketer (operation ofswitch STI in the Coder), the Ticketer closes resistance battery to leadISC which closes a circuit to the rst winding of relay 2RS. Relay 2RSoperates, locks via ground on lead 7RSH from the Coder, closes a path tothe rst winding of relay BCT, opens detection time-out lead ZTI fromlead ZZT, and grounds lead SCG. Relay BCT operates, locks via ground oncontacts IBB, prepares the circuit to switch STR in the Coder I2 vialead 8MM, closes lead SCA to SCM, opens leads 38K and SL and closesground to leads ISAL and SSAK. The Codexer I3 now receives the digitsfrom the Ticketer and sets them up for translation by the Translator.

When a translation has been received or the Coder I2 has been marked fora special routing directive and sending is to start, ground is closed tolead SSB which closes a circuit to relay 25B. Leads 24VAC and 4MOT areclosed in the Coder I2 which closes the circuit to the synchronous motorof the pulse generator 4PGU. Relay ZSB operates, locks, closes lead IDKto lead 3CT, opens lead IDK from lead ZKT, closes lead 4P7 from thepulse generator 4PGU preparatory to the operation of relay ZPE, closesthe outgoing loop leads ISR and IST to seize the Ticketer Selector ortrunk circuit, and opens the second winding of relay 2RS. The pulsegenerator 4PGU operates and closes ground pulses to lead 4P?.

Sending the Routing Directive The Control Digit.-( Operated: Relays IBB,2RS, SCT, and ZSB.) The combination of relays 2RS and 3CT operatedestablish the control digit pulsing condition. Pulses are nottransmitted to the outgoing loop on this digit. The rst ground pulsefrom the pulse generator closes a circuit to relay ZPB. The operatingpath of relay ZPE is: resistance battery via resistor ZRSA, contacts3CT6 of operated relay SCT, bank contacts N 0f switch 4S?. level A atnormal, and contacts of unoperated

1. IN AN AUTOMATIC TOLL TICKETING TELEPHONE SYSTEM, A FIRST EXCHANGEINCLUDING SWITCHING EQUIPMENT, A PLURALITY OF TRUNKS TO OTHER EXCHANGES,A TICKETER ACCESSIBLE TO SAID EQUIPMENT, A TRANSENDER ACCESSIBLE TO SAIDTICKETER, A TRANSLATOR ACCESSIBLE TO SAID TRANSENDER, AN INCOMING TRUNKLINE FROM ANOTHER EXCHANGE, SAID TICKETER ALSO ACCESSIBLE TO SAIDINCOMING TRUNK AND SAID TRUNK HAVING TALKING CONDUCTORS AND A CONTROLCONDUCTOR, MEANS FOR EXTENDING A CONNECTION FROM A LINE IN THE FIRSTEXCHANGE TO SAID TICKETER AND FOR CONNECTING A TRANSENDER AND ATRANSLATOR TO THE TICKETER DURING THE PROGRESS OF THE CALL, MEANS IN THETRANSLATOR OPERATED IN RESPONSE TO THE RECEIPT OF A CALLED PARTYDIRECTIVE TO RETURN A FIRST ROUTING TO SAID TRANSENDER TO EXTEND THECALL, MEANS IN THE SENDER OPERATED WHEN THE TICKETER IS SEIZED FROM THEINCOMING TRUNK TO SEND A SIGNAL TO THE TICKETER IN RESPONSE TO THERECEIPT OF THE SAME CALLED PARTY DIRECTIVE DURING THE PROGRESS OF ACALL, AND MEANS IN THE TICKETER OPERATED IN RESPONSE TO THE RECEIPT OFSAID SIGNAL TO APPLY AN INCREASED POTENTIAL TO THE CONTROL CONDUCTOR OFSAID INCOMING TRUNK, AND MEANS IN THE TRANSLATOR CONNECTED TO SAIDCONTROL CONDUCTOR AND OPERATED BY SAID INCREASED POTENTIAL TO RETURN ASECOND ROUTING TO SAID TRANSENDER TO EXTEND THE CALL FROM SAID INCOMINGTRUNK.